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Science & Technology

Left-handed people have one advantage over right-handed counterparts, study finds

Left-handed people have one advantage over right-handed counterparts, study finds
Photo by Kelly Sikkema on Unsplash

Approximately 10% of the population is left-handed, and the balance between lefties and righties has been the same for almost 5,000 years. People used to believe that left-handed people were evil or unlucky. The word "sinister" is even derived from the Latin word for "left."

In modern times, the bias against lefties for being different is more benign – spiral notebooks are a torture device, and ink gets on their hands like a scarlet letter. Now, a new study conducted at the University of Oxford and published in Brain is giving left-handers some good news. While left-handers have been struggling with tools meant for right-handers all these years, it turns out, they actually possess superior verbal skills.

Researchers looked at the DNA of 400,000 people in the U.K. from a volunteer bank. Of those 400,000 people, 38,332 were southpaws. Scientists were able to find the differences in genes between lefties and righties, and that these genetic variants resulted in a difference in brain structure, too. "It tells us for the first time that handedness has a genetic component," Gwenaëlle Douaud, joint senior author of the study and a fellow at Oxford's Wellcome Centre for Integrative Neuroimaging, told the BBC.


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Scientists then studied brain images from 10,000 people and found right-handed and left-handed people had differences in the parts of the brain associated with language. In left-handed people, "the left and right sides of the brain communicate in a more coordinated way," Douaud told CNN. The differences suggest that left-handers have better verbal skills than righties. It almost makes up for constantly bumping elbows with the person next to you at the dinner table.

"This raises the intriguing possibility for future research that left-handers might have an advantage when it comes to performing verbal tasks, but it must be remembered that these differences were only seen as averages over very large numbers of people and not all left-handers will be similar," Akira Wiberg, a Medical Research Council fellow at the University of Oxford who worked on the study, said in a release.

While the findings are fascinating, they're only just the beginning. Scientists need to do further studies to really dig into their meaning. "We need to assess whether this higher coordination of the language areas between left and right side of the brain in the left-handers actually gives them an advantage at verbal ability. For this, we need to do a study that also has in-depth and detailed verbal-ability testing," Douaud told CNN.

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Other studies have found that your dominant hand is 25% determined by genetics, and 75% determined by environmental factors, which should come as a relief to anyone who doesn't like feeling they're at the mercy of their genes.

So if you're left-handed, you're probably going to be a great conversationalist, but you're still going to end up with ink smudges on your hand if you want to write down your words.

Identity

Celebrate International Women's Day with these stunning photos of female leaders changing the world

The portraits, taken by acclaimed photographer Nigel Barker, are part of CARE's "She Leads the World" campaign.

Images provided by CARE

Kadiatu (left), Zainab (right)

True

Women are breaking down barriers every day. They are transforming the world into a more equitable place with every scientific discovery, athletic feat, social justice reform, artistic endeavor, leadership role, and community outreach project.

And while these breakthroughs are happening all the time, International Women’s Day (Mar 8) is when we can all take time to acknowledge the collective progress, and celebrate how “She Leads the World.

This year, CARE, a leading global humanitarian organization dedicated to empowering women and girls, is celebrating International Women’s Day through the power of portraiture. CARE partnered with high-profile photographer Nigel Barker, best known for his work on “America’s Next Top Model,” to capture breathtaking images of seven remarkable women who have prevailed over countless obstacles to become leaders within their communities.

“Mabinty, Isatu, Adama, and Kadiatu represent so many women around the world overcoming incredible obstacles to lead their communities,” said Michelle Nunn, President and CEO of CARE USA.

Barker’s bold portraits, as part of CARE’s “She Leads The World” campaign, not only elevate each woman’s story, but also shine a spotlight on how CARE programs helped them get to where they are today.

About the women:

Mabinty

international womens day, care.org

Mabinty is a businesswoman and a member of a CARE savings circle along with a group of other women. She buys and sells groundnuts, rice, and fuel. She and her husband have created such a successful enterprise that Mabinty volunteers her time as a teacher in the local school. She was the first woman to teach there, prompting a second woman to do so. Her fellow teachers and students look up to Mabinty as the leader and educator she is.

Kadiatu

international womens day, care.org

Kadiatu supports herself through a small business selling food. She also volunteers at a health clinic in the neighboring village where she is a nursing student. She tests for malaria, works with infants, and joins her fellow staff in dancing and singing with the women who visit the clinic. She aspires to become a full-time nurse so she can treat and cure people. Today, she leads by example and with ambition.

Isatu

international womens day, care.org

When Isatu was three months pregnant, her husband left her, seeking his fortune in the gold mines. Now Isatu makes her own way, buying and selling food to support her four children. It is a struggle, but Isatu is determined to be a part of her community and a provider for her kids. A single mother of four is nothing if not a leader.

Zainab

international womens day, care.org

Zainab is the Nurse in Charge at the Maternal Child Health Outpost in her community. She is the only nurse in the surrounding area, and so she is responsible for the pre-natal health of the community’s mothers-to-be and for the safe delivery of their babies. In a country with one of the world’s worst maternal death rates, Zainab has not lost a single mother. The community rallies around Zainab and the work she does. She describes the women who visit the clinic as sisters. That feeling is clearly mutual.

Adama

international womens day, care.org

Adama is something few women are - a kehkeh driver. A kehkeh is a three-wheeled motorcycle taxi, known elsewhere as a tuktuk. Working in the Kissy neighborhood of Freetown, Adama is the primary breadwinner for her family, including her son. She keeps her riders safe in other ways, too, by selling condoms. With HIV threatening to increase its spread, this is a vital service to the community.

Ya Yaebo

international womens day, care.org

“Ya” is a term of respect for older, accomplished women. Ya Yaebo has earned that title as head of her local farmers group. But there is much more than that. She started as a Village Savings and Loan Association member and began putting money into her business. There is the groundnut farm, her team buys and sells rice, and own their own oil processing machine. They even supply seeds to the Ministry of Agriculture. She has used her success to the benefit of people in need in her community and is a vocal advocate for educating girls, not having gone beyond grade seven herself.

On Monday, March 4, CARE will host an exhibition of photography in New York City featuring these portraits, kicking off the multi-day “She Leads the World Campaign.

Learn more, view the portraits, and join CARE’s International Women's Day "She Leads the World" celebration at CARE.org/sheleads.


Health

Over or under? Surprisingly, there actually is a 'correct' way to hang a toilet paper roll.

Let's settle this silly-but-surprisingly-heated debate once and for all.

Elya/Wikimedia Commons

Should you hang the toilet paper roll over or under?



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Some who saw the video thought that Asero came off as entitled and exemplified the younger generation’s lack of work ethic. In contrast, others sympathized with the young woman who is just beginning to understand how hard it is to find work-life balance in modern-day America.

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